城陵矶枯水位下降对洞庭湖区湘江尾闾航道的影响  

Effect of Chenglingji low water level decrease on Dongting lake Xiangjiang tail fairway

作　　者：刘哲[1] 冯小香[1] 彭伟[1] 张明[1] 

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456

出　　处：《水运工程》2015年第6期127-130,151,共5页Port & Waterway Engineering

摘　　要：三峡水库蓄水运行后,由于出库水沙条件的变化,引起坝下长距离的河床冲刷和水位下降。根据有关预测,水库运行20~50 a后,城陵矶枯水位将下降1~2 m。运用水动力学模型,计算城陵矶枯水位下降对洞庭湖区湘江尾闾航道的影响。计算结果表明：城陵矶枯水位下降1~2 m时,湖区航道水面比降加大,自湘江洞庭湖出口航道至湘江湖区航道营田滩处约80 km范围的沿程水位下降、航道水深减小,大部分已整治的滩险水深难以达到Ⅱ级航道标准,航道条件恶化。Due to the c operation of the Three Gorges hanges in water and sediment conditions of the library after the impoundment reservoir, which caused riverbed erosion and drawdown in a long distance at downstream of the dam. Chenglingji water level was estimated to drop 1 m to 2 m after the reservoir operation from 20 to 50 years. The effect on Dongting lake area Xiangjiang tail fairway under dry circumstances calculating the water 1 slope will increase if evel drops with the hydrodynamic model. The results show that the lake＇s Chenglingji water level drops ! m to 2 m under dry circumstances, and was evaluated by waterway surface water levels and channel depth will reduce significantly in the distance of 80 km from Xiangjiang Dongting lake outlet channel to Xiangjang lake area channel Yingtian beach, which may result Meanwhile, the renovated shoal＇s water depth will not be able

关 键 词：城陵矶 洞庭湖 湘江尾闾航道 水动力学模型 水位 

分 类 号：U69[交通运输工程—港口、海岸及近海工程]